Frequent fetal hiccups are due to the fact that the fetus’ lungs are not yet fully grown and the fetus needs to keep swallowing amniotic fluid at this time. By swallowing amniotic fluid while constantly improving the function of the lungs, the fetus spits out not the gas that an adult burps out, but the amniotic fluid. By repeatedly swallowing amniotic fluid and burping frequently, the fetus will continue to exercise its alveoli, which will become stronger and stronger in preparation for normal breathing after separation from the mother. When a pregnant mother notices frequent hiccups, it proves that the baby is working very hard to improve the breathing function of the lungs and there is no need to worry too much. The mother should also pay close attention to the fetal heartbeat and pay careful attention to the fetal movements every day, combined with the frequency of fetal hiccups, and if she does find any abnormalities, it is recommended that she go directly to the hospital to check the condition of the fetus.